package com.hmall.api.item.fallback;

import com.hmall.api.item.ItemClient;
import com.hmall.api.item.dto.ItemDTO;
import com.hmall.api.item.dto.OrderDetailDTO;
import com.hmall.common.utils.CollUtils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.openfeign.FallbackFactory;
import org.springframework.stereotype.Component;

import java.util.Collection;
import java.util.List;

/**
 * itemClient的通用降级策略
 *
 * @Author mr.Candy
 * @Date 2025/6/1810:07
 */
@Component
@Slf4j
public class ItemClientFallbackFactory implements FallbackFactory<ItemClient> {
    /**
     * 降级处理逻辑
     * @param cause
     * @return
     */
    @Override
    public ItemClient create(Throwable cause) {
        return new ItemClient() {
            @Override
            public List<ItemDTO> queryItemByIds(Collection<Long> ids) {
                log.error("远程调用ItemClient#queryItemByIds方法出现异常，参数：{}", ids, cause);
                cause.printStackTrace();
                // 查询购物车允许失败，查询失败，返回空集合
                return CollUtils.emptyList();
            }

            @Override
            public void deductStock(List<OrderDetailDTO> items) {
                log.error("远程调用ItemClient#deductStock方法出现异常，参数：{}", items, cause);
                cause.printStackTrace();
            }
        };

    }
}
